the root (no rank)
Archaea (domain)
Euryarchaeota (phylum)
Methanococcales (order)
Methanococcaceae (family)
[hide inferior taxa]
Methanococcus aeolicus (species)
Methanococcus ivanovii (species)
Methanococcus jannaschii (species)
Methanococcus maripaludis (species)
Methanococcus thermolithotrophicus (species)
Methanococcus thermophila (species)
Methanococcus vannielii (species)
Methanococcus voltae (species)
Methanolobus tindarius (species)
Methanothermococcus thermolithotrophicus (species)